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Thursday, 7 June 2007

WiTricitic Power : Electricity without CablesMIT Lab Discovers the Power of the UniverseA team of scientists at the Massachusetts Institute of Technology have demonstrated a wireless power transfer scheme they have dubbed 'WiTricity' or wireless electricity

The concept behind the technology is simple and based on the idea that two resonant objects on the same resonance frequency can exchange energy efficiently.While the demonstration was of a 60W globe being powered from a source over two metres (seven feet) away, a more popular application could be to recharge electronic gadgets such as mobile phones, making them truly wireless.

The key: Magnetically coupled resonanceObjects tuned to the same resonant frequency can transfer energy efficiently over some distance (like a tuning fork separated from a resonating musical instrument at the same pitch) with little energy dissipated to surrounding objects with different resonant frequencies. The MIT team had previously worked out the necessary resonance conditions that would ensure relatively efficient electrical power transmission and used their calculations to design two electromagnetically resonating coils coupled by their magnetic fields.A key point is that WiTricity does not use electromagnetic radiation, which would be inefficient and possibly hazardous. Instead, it relies on magnetically coupled resonance which gives efficient energy transfer and interacts very weakly with most common materials including living creatures. "The fact that magnetic fields interact so weakly with biological organisms is also important for safety considerations," said researcher Andre Kurs.

The system uses a pair of copper coils. One generates a magnetic field oscillating in the megaHertz range, and the other resonates with that field and converts the energy back into electricity. In comparison with magnetic induction (as used in electrical transformers), resonant coupling remains efficient when the two coils are not very close together.

WiTricitic Power : Electricity without CablesMIT Lab Discovers the Power of the UniverseA team of scientists at the Massachusetts Institute of Technology have demonstrated a wireless power transfer scheme they have dubbed 'WiTricity' or wireless electricity

The concept behind the technology is simple and based on the idea that two resonant objects on the same resonance frequency can exchange energy efficiently.While the demonstration was of a 60W globe being powered from a source over two metres (seven feet) away, a more popular application could be to recharge electronic gadgets such as mobile phones, making them truly wireless.

The key: Magnetically coupled resonanceObjects tuned to the same resonant frequency can transfer energy efficiently over some distance (like a tuning fork separated from a resonating musical instrument at the same pitch) with little energy dissipated to surrounding objects with different resonant frequencies. The MIT team had previously worked out the necessary resonance conditions that would ensure relatively efficient electrical power transmission and used their calculations to design two electromagnetically resonating coils coupled by their magnetic fields.A key point is that WiTricity does not use electromagnetic radiation, which would be inefficient and possibly hazardous. Instead, it relies on magnetically coupled resonance which gives efficient energy transfer and interacts very weakly with most common materials including living creatures. "The fact that magnetic fields interact so weakly with biological organisms is also important for safety considerations," said researcher Andre Kurs.

The system uses a pair of copper coils. One generates a magnetic field oscillating in the megaHertz range, and the other resonates with that field and converts the energy back into electricity. In comparison with magnetic induction (as used in electrical transformers), resonant coupling remains efficient when the two coils are not very close together.

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nevertheless

Nevertheless is a showcase of ideas, inventions and creative inventiveness of individuals, groups and companies, concerns for things green that can help change a polluted and climate disrupted world. Also of interest is the harm that human penetration and exploitation is doing to the world around us especially habitat destruction and species extinction.

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Paul Dooley

Hi, thanks for dropping by. Within the last 6 years, I've come to experience many things internet including social media and feel it's akin to weaving multi tapestries with threads of writing, posting, following, commenting, reading, researching and learning more about my interests, in the arts, culture, technology, science and various diverse genres of music.